Changes between Initial Version and Version 1 of Ticket #15535, comment 8


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Timestamp:
01/14/15 02:13:07 (7 years ago)
Author:
roed
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  • Ticket #15535, comment 8

    initial v1  
    11I ran into this issue on Sage 6.4.1 trying to compute characteristic polynomials.  I was computing the characteristic polynomial of hundreds of thousands of 3x3, 4x4, ..., 8x8 integer matrices, and at some point I got the following:
    22
     3{{{
    34sage: A = matrix(ZZ, 4, 4, [50528, 38927, 19455, 31617, 58686, 39770, 31059, 21905, 13382, 35615, 18158, 11629, 25923, 12324, 51823, 27000])
    45sage: A.charpoly()
     
    78sage: B = copy(A); B.charpoly()
    89x^4 - 135456*x^3 + 1234244249*x^2 + 17242461420805*x - 995535814473032365
     10}}}